Printing-press impression-cylinder



J. J. WALSER. PRINTING PRESS IMPRESSION CYLINDERV APPLICATION mansarmzo, 1911. RENEWED JAN. 8. 1919.

Patented May 18, 1920. v2 SHEETS-SHEET l.

Jg W INVENTOR A RNEY J. J. WALSER.

PRINTING PRESS IMPRESSION CYLINDER,- APPLICATION FILED SEPT-20, 191?.RENEWED m. a, 1919.

1 ,340, 1 94;, Patented May 18, 1920.

2 SHEETS-SHEET 2.

2;? MENTOR ATTORNEY UNITED STATES PATENT OFFICE.

JOSEPH J. WALSER, OF CHICAGO, ILLINOIS, ASSIGNOR TO GOSS PRINTING PRESSCOMPANY, A CORPORATION OF ILLINOIS.

PRINTING-PRESS IMPRESSION-CYLINDER.

Specification of Letters Patent.

Original application filed July 11, 1917, Serial No. 179,830. Dividedand this application filed September 20, 1917, Serial No. 192,275.Renewed. January 8, 1919. Serial No. 270,249.

To all whom it may concern:

Be it known that I, JOSEPH J. WVALSER, a

citizen of theUnited States, residing at Chicago, county of Cook, andState of Illinois, have invented certain new and useful Improvements inPrinting-Press lmpression-Cylinders, of which the following is aspecification.

The invention relates to impression cylinders for printing presses andmore especially to a cylinder designed to cooperate with plate or formcylinders which are adapted to carry varying numbers of platescircumferentially about the cylinder.

The particular objects and advantages of the invention will be pointedout in part in connection with the description of the presentembodiment, and in part they will be obvious herefrom or may be learnedby practice with the invention.

The invention consists in the novel parts, constructions, arrangements,combinations and improvements herein shown and described.

This application is a division of my application Ser. No. 179,830, filedJuly 11, 1917.

The accompanying drawings, referred to herein and constituting a parthereof, illustrate one embodiment of the invention, and together withthe description serve to explain the principles thereof.

Of the drawings Figure l is an end elevation of the impression cylinderarranged for four or eight plates around on the form cylinder; and Fig.2 is a similar view showing the impression cylinder arranged for fiveplates around on the form cylinder.

Certain kinds of printing presses are adapted and constructed to printupon sheets or webs difierent sizes of pages, or pages arranged eitheralong or across the web, either with pages of the same size or ofvarying sizes as just described. In such presses, the form or platecylinder is adapted to take diiferent numbers of platesconsideredcircumferentially about the cylinder, and one ob ect of thepresent invention is to provide an impression cylinder adapted tocooperate with such a form cylinder.

As embodied and as illustrated by way of example in the accompanyingdrawings, the impression cylinder is adapted to cooperate with such aform cylinder carrying alternatively or interchangeably four, five oreight plates, considered circumferentia-lly about the form cylinder.

Referring more particularly to the illus trated embodiment, theimpression cylinder is shown with its cylindrical surface dividedlongitudinally into a plurality of sections, marked respectively 1, 2,3, 4L, 5 and 6, there being between each two adjacent sections a gap oropening extending longitudinally along the cylinder, said gaps beingprimarily for the purpose of permitting the passage or ingress andegress of the blankets, packing sheets, or other surfacing material forthe impression cylin der, the holding and stretching mechanism beingcontained within the cylinder.

Along the side or disposed along each of the gaps, are means fordetachably holding blocks or rails adapted to close the gaps, suchblocks or rails having their outer sur face curved to form acontinuation of the cylindrical surface, so that when a gapclosing block1s in position at a particular gap, the gap is entirely closed and thesur-v face of the cylinder is unbroken and uniform past the gap. Inconjunction with the foregoing, and in accordance with one feature ofthe invention, narrower blocks or rails are provided, which areinterchangeable with the gap closing blocks or rails, but the narrowerblocks are proportioned and dimensioned to leave the gap open toaccommodate the blanket, packing sheet or other surface coverings of theimpression cylinder Referring more in detail to the structures andmechanism just outlined, in the various recesses are shown, more or lessdiagrammatically the reels 7, upon Which the pack-- ing sheets, blanketsor the like are wound. The illustrated form of fastening device for theother end of the impression cylinder covering comprisespins 8 set in theface of Patented May 18, 1920.

detachable and interchangeable blocks or bars 9 constituting part of thesurface of the impression cylinder. Clamps 10 are mounted upon shafts11, and press the cover sheets down over the pins 8 in a well knownmanner.

The blocks or bars 9 are seated in longitudinally disposed recesses 12formed in the impression cylinder, the bars 9 being held in position bysuitable means such as countersunk screws 13. The bars 9 are of suchwidth that a gap is left between the bar and the opposite side of therecess in the impression cylinder, as is shown at a, b and d in Fig. 1.Through this gap the covering sheet for the segments of the impressioncylinder pass from the fastening means to the reeling and stretchingmeans in the next recess in the impression cylinder.

Interchangeable with the blocks or bars 9 are similar blocks or bars 1%,the blocks or bars 14:, however, being of sufficient width to entirelyclose the longitudinally disposed gaps in the impression cylinder. Byinterchanging the blocks or bars 9 and 14L, the size and arrangement ofthe continuous surface sectors or sections of the impression cylindermay be changed or varied, to correspond with changes in the size andposition of the plates on the cooperating form cylinder. Thus, in thearrangement of the blocks or bars 9 and 1% shown in Fig. 1, the packingor blankets on the impression cylinder will extend from a to 7), from Z)to c, from 0 to (Z and from (Z to a, ma ring four equal sections in thesurface of the impression cylinder, each such section being adapted tocooperate with one or two printing plates upon the form cylinder, andactually cooperating with two plates when there are eight plates aroundthe form cylinder. r

By interchanging the block 14 at f with the block9 at a, andinterchanging block 14 at 0, with block 9 at (Z, as shown in Fi 2, wewould then have three sectors or sections in the surface of theimpression cylinder, one extending from section 6 to section 7, anothersuch sector or section extending from f to c, and the other from 0 to 6,thus two of the sections would be twice as large as the remaining one.The two larger sections would be adapted to cooperate with two platesupon the form cylinder and the small section with one such plate, thatis, there would be five plates around the form cylinder.

Thus, by shifting the interchangeable blocks, the requisite variationsmay be made in the extent and location of the continuous bearingsurfaces for cooperating with the plates as variously arranged, or asvarying in number, on the cooperating form cylinder, and at the sametime, and preferably by the same means, the blanket holding andstretching means are shifted and modified to suit.

It will be understood that changes may be made from the structures shownand described without departing from the principles of the invention andwithout sacrificing its chief advantages. I

lVhat I claim as my invention and desire to secure by Letters Patentis 1. A printing press impression cylinder including in combination thecylinder body having a plurality of gaps extending longitudinally alongits cylindrical exterior and blocks adapted to close said gaps so as topresent an unbroken cylindrical surface, and means for holding theblocks in the recesses, the blocks being shiftable from one gap toanother.

2. printing press impression cylinder including in combination thecylinder body having a plurality of gaps extending longitudinally alongits cylindrical exterior and blocks adapted to close said gaps so as topresent an unbroken cylindrical surface, and means, includingcounter-sunk screws, for holding the blocks in the recesses, the blocksbeing shiftable from one gap to another 3. A printing press impressioncylinder including in combination the cylinder body having a pluralityof gaps extending longitudinally along its cylindrical exterior, aplurality of recesses formed in the cylinder along the edges of saidgaps, and a plurality of blocks of different width adapted to beinterchangeably seated in said recesses, some of the blocks beingsufficient in width to close said gaps, and some of the blocks being oflesser width.

4. A printing press impression cylinder including in combination thecylinder body having a plurality of gaps extending longitudinally alongits cylindrical exterior, a plurality of recesses formed in the cylinderalong the edges of said gaps, and a plurality of blocks of difierentwidth adapted to be interchangeably seated in said recesses, some of theblocks being sufiicient in width to close said gaps, and some of theblocks being of lesser width, and means engagin the blocks and therecess to hold the blocks in position in the recess.

5. A printing press impression cylinder including in combination thecylinder body having a plurality of gaps extending longitudinally alongits cylindrical exterior, a plurality of recesses formed in the cylinderalong the edges of said gaps, and a plurality of blocks of differentwidth adapted to be interchangeably seated in said recesses, some of theblocks being sufficient in width to close said gaps, and some of theblocks being of lesser width and means, including counter-sunk screws,engaging the blocks and the recess to hold the blocks in position in therecesses.

6. A printing press impression cylinder including in combination thecylinder body having a plurality of gaps extending longitudinally alongthe cylindrical exterior, a plurality of recesses formed in the cylinderalong the edges of said gaps, and a plurality of blocks of differentwidth adapted to be interchangeably seated in said recesses, some of theblocks being suflicient in width to close said gaps, and some of theblocks being of lesser width, and blanket holding devices carried by thenarrower blocks.

7. A printing press impression cylinder including in combination thecylinder body having a plurality of gaps extending longi tudinally alongthe cylindrical exterior, a plurality of recesses formed in the cylinderalong the edges of said gaps, and a plurality of blocks of differentwidth adapted to be interchangeably seated in said recesses, some of theblocks being suflicient in width to close said gaps, and some of theblocks being of lesser width, and blanket stretching means within saidgaps.

8. A printing press impression cylinder including in combination thecylinder body having a plurality of gaps extending longitudinally alongthe cylindrical exterior a plurality of recesses formed in the cylinc eralong the edges of said gaps, and a plurality of blocks of differentwidth adapted to be interchangeably seated in said recesses, some of theblocks being sufficient in width to close said gaps, and some of theblocks being of lesser width, and blanket stretching means within saidgaps and including blanket holding means carried by the narrower blocks.

9. A printing press impression cylinder divided into sections and havinga plurality of means for stretching packing over the surface of thecylinder, and means for varying the circumferential extent of thesections over which the packing is stretched.

10. A printing press impression cylinder divided into sections eachsection acting as an impression surface,.and means for changing thenumber of said sections from even to odd and vice versa.

11. A printing press impression cylinder divided into sections eachsection acting as an impression surface, and means for changing thenumber of said sections from even to odd and vice versa, and means forstretching packing over the Various sections whether even or odd innumber.

12. A printing press impression cylinder having means for stretchingpacking over the surface of the cylinder and through a recess in thecylinder, and a block completely filling said recess peripherally in thecylinder when the packing stretching means is not in use.

13. A printing press impression cylinder adapted to cooperate with aform cylinder taking either an even or odd number of plates about itscircumference, and means for stretching packing over the surface of theimpression cylinder for distances varying in conformity to the number ofplates on the form cylinder.

14. A printing press having a cylindrical printing couple comprisingimpression cylinder equipped with a plurality of means for stretchingpacking over its surface, said means being so located that thecircumferential length of the sections of packing can be fixed tocooperate with the plates on the form cylinder when carrying either aneven or an odd number of plates around its circumference.

15. A printing press impression cylinder equipped with a plurality ofmeans for stretching packing over its surface, said means being solocated that the packing can be put on in one or more sections, the onesection extending all around the cylinder and the plurality of sectionsextending only partially around the cylinder.

16. A printing press impression cylinder equipped with a plurality ofmeans for stretching packing over its surface, each of said. meansincluding a stretching device within a recess in the cylinder and ablock which can be inset into said recess in the circumference of thecylinder to make the circumference of the cylinder continuous over saidmeans when not in use.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOSEPH J. WVALSER. lVitnesses J. F. KAEHLER, E. A. GRAHAM.

